Middle Aged Delusional Syndrome. When I was in my 20s I had to undergo a rigorous physical to get medical coverage at my job. Treadmill, VO2 max, the works. Turns out those records are still at the clinic now. Guess what? I was in better shape in my 20s. No one is in better shape in their 40s than in their 20s unless they had a disease or something.

But it looks like you are on the opposite trend. You'll be awesome in your 60s! My God, you just might solve all the world's problems! How will society cope with an individual as smart and strong as you are becoming?

theorellior: It probably comes down to choosing the most immortal molecules to ingest.

Atoms. But I suppose you think atoms have an age, right? The same ones that have been cycling through everything on the Earth for billions of years, and yet can be 40 years old in you, or 1 year old in a baby!

Oh Brave New World that has such atoms in it!

I wonder how atoms keep track of all the different ages they are supposed to have.

Even better, how can we measure them?

Like, a carbon atom from you, we can measure something about it that says it came from a 40 year old human, right?

Right?

It's different somehow? Maybe it reacts slower with oxygen, or maybe its electrons don't quite emit the same wavelength of light anymore? Maybe its protons weigh less? Maybe their charge is starting to leak, like a tiny NiCd cell?

So, where are all these atoms? Is there like a pile of used up carbon atoms that just don't react anymore?